This discussion may contain spoilers!
When Bonnie told Clementine she played a major part in Luke's untimely demise, one thing that came to mind was almost relief that Luke wasn't here to see an entire group festering away to nothing and a grown woman placing blame entirely on an eleven year old girl for a death no one could stop. I felt relief he was dead... to not see what his beloved Bonnie became.
I felt terrible that I never fully trusted him. He was a good man though, that much was made apparent in his final moments. Telling not only Clementine and Bonnie to stay away, but becoming increasingly more agitated with Bonnie for suggesting Clem help him. It shows just how wrong I was with his motives. His death really hit me hard, I'd almost say harder than Sarah's. I believe he was the glue to the group. Once he died, everyone's true colors were shown.
Anyway, that's my rant for the day. I would like to know what you thought once Bonnie flipped on Clementine. I was just thinking "at least Luke isn't here to see..."